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. 2020 Oct 20;73:101613. doi: 10.1016/j.irfa.2020.101613

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© 2020 Published by Elsevier Inc.

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

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Fig. 5 — Comparison between estimated coefficients of QQR & QR Note: These graphs indicate the validity of QQR estimates through comparing the slope of the coefficients from standard quantile regression and the averaged quantile on quantile regression. The plain lines show the QR coefficients while the dotted lines indicate the QQR coefficients. In each graph, the x-axis shows the quantiles (0.5–0.95) while the y-axis shows the coefficients of Crypto_t, estimated from QR & QQR. The selected cryptocurrencies are Bitcoin (BTC), Ethereum (ETH), XRP, Bitcoin Cash (BCH), Bitcoin SV (BSV), Litecoin (LTC), Binance Coin (BNB), EOS, Cardano (ADA) and Tezos (XTZ).

Fig. 5 — Comparison between estimated coefficients of QQR & QR Note: These graphs indicate the validity of QQR estimates through comparing the slope of the coefficients from standard quantile regression and the averaged quantile on quantile regression. The plain lines show the QR coefficients while the dotted lines indicate the QQR coefficients. In each graph, the x-axis shows the quantiles (0.5–0.95) while the y-axis shows the coefficients of Crypto_t, estimated from QR & QQR. The selected cryptocurrencies are Bitcoin (BTC), Ethereum (ETH), XRP, Bitcoin Cash (BCH), Bitcoin SV (BSV), Litecoin (LTC), Binance Coin (BNB), EOS, Cardano (ADA) and Tezos (XTZ).